We are not surprised, of course, because Pres. Obama has continually opposed efforts to allow the people of a state to protect marriage, beginning with his opposition of Prop 8 during the 2008 campaign:

President Barack Obama today came out against the proposed constitutional amendment on North Carolina's May 8th ballot banning same sex marriages and civil unions, weighing into a fight in a key battleground state.

His campaign issued a statement saying the amendment was discriminatory.

“While the president does not weigh in on every single ballot measure in every state, the record is clear that the President has long opposed divisive and discriminatory efforts to deny rights and benefits to same sex couples,” said Cameron French, his North Carolina campaign spokesman.

“That’s what the North Carolina ballot initiative would do – it would single out and discriminate against committed gay and lesbian couples – and that’s why the President does not support it.” -- News Observer